This is my first time incubating eggs. I have a mix of 21 silkies and 16 cochins. I have the temp at 99.5, but my humidity is at 38%. I saw different humidity levels for different days. What is the correct level for the first, second, and third weeks? I know I'm supposed to raise it to about 70-75% humidity during the last couple of days before and during the hatch. If you have any other pointers I would really appreciate them!